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- W3110599992 abstract "The thermoelectric properties of BixSb1-xTe3 processed through milling have been extensively studied with varied results that needs to be rationalized. Since cryo-milling is a relatively cleaner milling process compared to other milling processes, we explore this technique to reduce the particle size prior to compaction to get an insight into the thermoelectric properties. We first report the results of cryomilled BiSbTe3 compacted by spark plasmas sintering (SPS) process and show that milling leads to a change in transport behavior from ‘p’ to ‘n’ type similar to that reported for Bi2Te3. It is shown that the defects induced by milling is responsible for this change in materials behavior. We further study the effect of change in Bi to Sb ratio and excess tellurium on the thermoelectric properties when processed through cryo-milling as well as casting using a chilled copper block. Excess tellurium leads to a microstructure containing a fraction of layered eutectic that gets further fragmented during cryo-milling. Although the Seebeck coefficient does not change significantly, reflecting the cleanliness of the process, the thermal conductivity changes during hot compaction leading to an improvement of ZT. However, a comparison of all the reported results does not reveal any systematics in thermoelectric properties reflecting the difficulties with these materials." @default.
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- W3110599992 date "2021-02-01" @default.
- W3110599992 modified "2023-10-10" @default.
- W3110599992 title "Thermoelectric properties of BiSbTe-type alloys prepared by chill-casting and cryo-milling" @default.
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- W3110599992 doi "https://doi.org/10.1016/j.matchemphys.2020.124116" @default.
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